Prestressed Concrete Steel Strand - 2

Prestressed Concrete Steel Strand - 2

Product Description

Prestressed concrete steel strand, also known as 1× 7 low-relaxation prestressed concrete strand, is twisted steel cable composed of 7 high-strength steel wires, which has been through the stress relief treatment (stabilized). Steel embedded in prestressed concrete structure has been pre-stretched before load been applied on, applying a prestressing force on the concrete to offset or reduce the tensile stress generated by load, thereby enhancing the crack resistance and stiffness of the components, reducing the width of cracks, as well as using high-strength steel and concrete effectively to save steel material and reduce the weight.

Features:
High-strength, low-relaxation, supply in coil, large-length, low-consumption, strong bond with concrete, convenient construction.
Tensile strength grades are of 1860MPa (common) and 1720, 1960, 2000 Mpa.

Technology Standard
Chinese Standard: GB/T 5224
American Standard: ASTM A416
British Standard: BS 5896
Japanese Standard: JIS G3536
Australia and New Zealand Standard: AS/NZS 4672
Brazilian Standard: NBR-7483

Field of Application:
For roads, bridges, railways, water control projects, anchor tension components, nuclear power plants, city construction, etc.
Nominal Diameter
mm
Tolerance
mm
Reference Section
mm 2
Reference Mass
g/m
Tensile Strength
Rm/MPa
Maximum Force
Fm/kN
Required Non-proportional Extension Force
Fp0.2/kN
Total Elongation Rate of Maximum Force
(L0≥ 500mm)
Agt/%
Stress Relaxation Properties  
The Ratio of
Initial Load to Nominal Maximum Force
%
r
1000h Stress Relaxation Rate
%
 
 
9.50 +0.3
-0.15
54.8 430 1720 94.3 84.9 3.5 60
 
70
 
80
1.0
 
2.5
 
4.5
 
1860 102 91.8  
1960 107 96.3  
11.10 74.2 582 1720 128 115  
1860 138 124  
1960 145 131  
12.70 +0.40
-0.20
98.7 775 1720 170 153  
1860 184 166  
1960 193 174  
15.20 140 1101 1720 241 217  
1860 260 234  

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